npm install typescript
npm i ts-loader
配置webpack.config.js的loader
{
test: /\.ts$/,
exclude: /node_modules/,
use: ['ts-loader']
}
webpack全部配置如下：
const path = require('path')//node内置path模块
const {
webpack } = require('webpack')
const HtmlPlugin = require('html-webpack-plugin')//1引入 把指定目录下index复制放到跟目录
const ExtractTextPlugin = require('extract-text-webpack-plugin'); //css单独打包
const htmlPlugin = new HtmlPlugin({
template: './src/index.html',//源文件存放路径
filename: './index.html',//指定生成文件路径
})
// 按需导入插件、得到插件构造函数、创建实例对象
const {
CleanWebpackPlugin } = require('clean-webpack-plugin')//每次打包前清掉之前打包的
const cleanPlugin = new CleanWebpackPlugin()
var APP_PATH = path.resolve(__dirname, 'src'); //__dirname 中的src目录，以此类推
console.log(path);
// loader处理非.js文件css-loader less-loader babel-loader（处理webpack处理不了的高级js语法）
//source-map 辅助定位到错误的源代码
module.exports = {
mode: 'development',// mode 用来指定构建模式
// devtool: 'eval-source-map',//开发模式下运行适合报错行数与原代码一致
devtool: 'source-map',//打包后即定位行数也暴漏代码！！！
// entry: path.join(__dirname, './src/index.js'),//打包入口entry可以是数组（配合output.library使用不然只导出最后一个）对象
entry: {
myApp:
[
path.join(__dirname, './src/index.js')
]
},
//打包出口
output: {
publicPath: '/', //配置发布到线上服务器的路径url前缀,这是静态资源引用路径 /my/vue/
path: path.join(__dirname, '/dist'),//输出文件的存放路径
filename: '[name].js',//输出文件的路径/名字 多个chunk输出【name】
chunkFilename: 'haha.js',//配置无入口的chunk在输出时的文件名（eg：import（）/使用commonChunkPlugin）
library: 'myTest',//配置导出库名字
libraryTarget: 'var',//配置已何种方式导出库（var-默认，commonjs,commonjs2,this,window,global）
},
plugins: [
htmlPlugin,
cleanPlugin,
// new ExtractTextPlugin('[name].css'),
// new ExtractTextPlugin({
// filename: `[name]_[contenthash:8].css`
// })
],//挂载实例对象
devServer: {
https: false,
open: true,
// host: '0.0.0.0',
port: 8080,
proxy: {
'/api': 'https://dasdsadsad.com'
}
},
// loader=>
module: {
rules: [
{
test: /\.css/, use: ['style-loader', 'css-loader'] },
{
test: /\.less/, use: ['style-loader', 'css-loader', 'less-loader'] },
//图片值如果大于limit给定的字节 不被转base64
{
test: /\.jpg|png|gif$/,
use: {
loader: 'url-loader',
options: {
limit: 1024 * 200000,
outputPath: 'image'//打包存放路径
}
}
},
// 高级js
{
test: '/\.js/',
exclude: /node_modules/,//排除项，可以是数组形式
use: {
loader: 'babel-loader',
options: {
//参数项
//声明Babel插件。用来转化class高级语法
plugins: ['@babel/olugin-proposal-class-properties']
}
},
include: [APP_PATH]//只命中src目录下的js，加快搜索速度
},
{
test: /\.ts$/, exclude: /node_modules/, use: ['ts-loader'] }
]
},
resolve: {
//通过别名导入路径映射新的路径
extensions: ['.js', '.jsx', '.less', '.css', '.json'], //后缀名自动补全
alias: {
component: path.resolve(__dirname, 'src/component'),
}
}
}
tsc init 新建tsconfig.json
配置如下
{
"compilerOptions": {
/* Visit https://aka.ms/tsconfig.json to read more about this file */
/* Projects */
// "incremental": true, /* Enable incremental compilation */
// "composite": true, /* Enable constraints that allow a TypeScript project to be used with project references. */
// "tsBuildInfoFile": "./", /* Specify the folder for .tsbuildinfo incremental compilation files. */
// "disableSourceOfProjectReferenceRedirect": true, /* Disable preferring source files instead of declaration files when referencing composite projects */
// "disableSolutionSearching": true, /* Opt a project out of multi-project reference checking when editing. */
// "disableReferencedProjectLoad": true, /* Reduce the number of projects loaded automatically by TypeScript. */
/* Language and Environment */
"target": "es2015" /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */,
// "lib": [], /* Specify a set of bundled library declaration files that describe the target runtime environment. */
// "jsx": "preserve", /* Specify what JSX code is generated. */
// "experimentalDecorators": true, /* Enable experimental support for TC39 stage 2 draft decorators. */
// "emitDecoratorMetadata": true, /* Emit design-type metadata for decorated declarations in source files. */
// "jsxFactory": "", /* Specify the JSX factory function used when targeting React JSX emit, e.g. 'React.createElement' or 'h' */
// "jsxFragmentFactory": "", /* Specify the JSX Fragment reference used for fragments when targeting React JSX emit e.g. 'React.Fragment' or 'Fragment'. */
// "jsxImportSource": "", /* Specify module specifier used to import the JSX factory functions when using `jsx: react-jsx*`.` */
// "reactNamespace": "", /* Specify the object invoked for `createElement`. This only applies when targeting `react` JSX emit. */
// "noLib": true, /* Disable including any library files, including the default lib.d.ts. */
// "useDefineForClassFields": true, /* Emit ECMAScript-standard-compliant class fields. */
/* Modules */
"module": "commonjs" /* Specify what module code is generated. */,
"rootDir": "src" /* Specify the root folder within your source files. */,
// "moduleResolution": "node", /* Specify how TypeScript looks up a file from a given module specifier. */
// "baseUrl": "./", /* Specify the base directory to resolve non-relative module names. */
// "paths": {}, /* Specify a set of entries that re-map imports to additional lookup locations. */
// "rootDirs": [], /* Allow multiple folders to be treated as one when resolving modules. */
// "typeRoots": [], /* Specify multiple folders that act like `./node_modules/@types`. */
// "types": [], /* Specify type package names to be included without being referenced in a source file. */
// "allowUmdGlobalAccess": true, /* Allow accessing UMD globals from modules. */
// "resolveJsonModule": true, /* Enable importing .json files */
// "noResolve": true, /* Disallow `import`s, `require`s or `<reference>`s from expanding the number of files TypeScript should add to a project. */
/* JavaScript Support */
// "allowJs": true, /* Allow JavaScript files to be a part of your program. Use the `checkJS` option to get errors from these files. */
// "checkJs": true, /* Enable error reporting in type-checked JavaScript files. */
// "maxNodeModuleJsDepth": 1, /* Specify the maximum folder depth used for checking JavaScript files from `node_modules`. Only applicable with `allowJs`. */
/* Emit */
// "declaration": true, /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
// "declarationMap": true, /* Create sourcemaps for d.ts files. */
// "emitDeclarationOnly": true, /* Only output d.ts files and not JavaScript files. */
"sourceMap": true /* Create source map files for emitted JavaScript files. */,
// "outFile": "./", /* Specify a file that bundles all outputs into one JavaScript file. If `declaration` is true, also designates a file that bundles all .d.ts output. */
"outDir": "dist" /* Specify an output folder for all emitted files. */,
// "removeComments": true, /* Disable emitting comments. */
// "noEmit": true, /* Disable emitting files from a compilation. */
// "importHelpers": true, /* Allow importing helper functions from tslib once per project, instead of including them per-file. */
// "importsNotUsedAsValues": "remove", /* Specify emit/checking behavior for imports that are only used for types */
// "downlevelIteration": true, /* Emit more compliant, but verbose and less performant JavaScript for iteration. */
// "sourceRoot": "", /* Specify the root path for debuggers to find the reference source code. */
// "mapRoot": "", /* Specify the location where debugger should locate map files instead of generated locations. */
// "inlineSourceMap": true, /* Include sourcemap files inside the emitted JavaScript. */
// "inlineSources": true, /* Include source code in the sourcemaps inside the emitted JavaScript. */
// "emitBOM": true, /* Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files. */
// "newLine": "crlf", /* Set the newline character for emitting files. */
// "stripInternal": true, /* Disable emitting declarations that have `@internal` in their JSDoc comments. */
// "noEmitHelpers": true, /* Disable generating custom helper functions like `__extends` in compiled output. */
// "noEmitOnError": true, /* Disable emitting files if any type checking errors are reported. */
// "preserveConstEnums": true, /* Disable erasing `const enum` declarations in generated code. */
// "declarationDir": "./", /* Specify the output directory for generated declaration files. */
/* Interop Constraints */
// "isolatedModules": true, /* Ensure that each file can be safely transpiled without relying on other imports. */
// "allowSyntheticDefaultImports": true, /* Allow 'import x from y' when a module doesn't have a default export. */
"esModuleInterop": true /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables `allowSyntheticDefaultImports` for type compatibility. */,
// "preserveSymlinks": true, /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */
"forceConsistentCasingInFileNames": true /* Ensure that casing is correct in imports. */,
/* Type Checking */
"strict": true /* Enable all strict type-checking options. */,
// "noImplicitAny": true, /* Enable error reporting for expressions and declarations with an implied `any` type.. */
"strictNullChecks": true /* When type checking, take into account `null` and `undefined`. */,
// "strictFunctionTypes": true, /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */
// "strictBindCallApply": true, /* Check that the arguments for `bind`, `call`, and `apply` methods match the original function. */
// "strictPropertyInitialization": true, /* Check for class properties that are declared but not set in the constructor. */
// "noImplicitThis": true, /* Enable error reporting when `this` is given the type `any`. */
// "useUnknownInCatchVariables": true, /* Type catch clause variables as 'unknown' instead of 'any'. */
// "alwaysStrict": true, /* Ensure 'use strict' is always emitted. */
// "noUnusedLocals": true, /* Enable error reporting when a local variables aren't read. */
// "noUnusedParameters": true, /* Raise an error when a function parameter isn't read */
// "exactOptionalPropertyTypes": true, /* Interpret optional property types as written, rather than adding 'undefined'. */
// "noImplicitReturns": true, /* Enable error reporting for codepaths that do not explicitly return in a function. */
// "noFallthroughCasesInSwitch": true, /* Enable error reporting for fallthrough cases in switch statements. */
// "noUncheckedIndexedAccess": true, /* Include 'undefined' in index signature results */
// "noImplicitOverride": true, /* Ensure overriding members in derived classes are marked with an override modifier. */
// "noPropertyAccessFromIndexSignature": true, /* Enforces using indexed accessors for keys declared using an indexed type */
// "allowUnusedLabels": true, /* Disable error reporting for unused labels. */
// "allowUnreachableCode": true, /* Disable error reporting for unreachable code. */
/* Completeness */
// "skipDefaultLibCheck": true, /* Skip type checking .d.ts files that are included with TypeScript. */
"skipLibCheck": true /* Skip type checking all .d.ts files. */
}
}
// {
// "compilerOptions": {
// "module": "ES2015",
// "target": "ES2015",
// "strict": true
// }
// }
然后
npm run dev
或者yarn dev即可运行